Air engine



(No Model.)

2 Sheets-Sheet', 2.

H, H. BURRITT.

AIB. ENGINE.

No. 278,397. al Patented May 29,1883.

Kvm @n n-Lilhognpher. washington, DA C.

d UNITED] STATES PATENT OFFICE.

e HARVEY E. RURRITT, E NEWARK, NEW JERsEY.

AIR-ENGINE.

SPECIFICATION formingpart of Letters Patent No. 278,397', dated May 29, 18,83.

Application filed March 21,1883.

` f Io all whom it may concern Beit known that I, HARVEY H. BURRITT,

l f a citizen ot' the United States, residing at Newark, in the county ot' .Essex and State of New Jersey, have invented certain new and useful Improvements in Hot-Air Engines and I do y hereby declare the followingto be a full, clear, and exact description of the invention, such as will enable others skilled in the art t which it appertains to make and use the s"`ame,refer y, ence being had to the accompanying drawiu gs,

" l `and to letters of reference marked thereon, e which form a part of this specicatiou.

This invention relates to that class of engines known as air-engines, and has for its object a' greater efficiency of action and simplicity of construction in such engines.

:pao

lhe invention consists of such an arrange-` ment and combination ofiparts as will be hereinafter set forth, and finally embodied in the i claims.

In the drawings, in which similar letters ot y reference indicate like parts in each of the sevy tion.

lparts of which are broken away. Fig. 3 is a eral figures, Figure l is a side elevation of an engine embodying my invention, partly in sec- Fig. 2 is a front elevation of the same,

section taken through line :c of Fig. 2.

The motive power in this engine and in those similar to itV is due to the expansion and con- 1 traction of a body of air confined in a cylinder having therein a working-piston, a, Fig. 1, and

" chamber between it and the surrounding cylinder for the passage of air. The heat for the expansion of the air is applied below the cylinder, either coal, gas, or other suitable fuel being used, as may be convenient or desirable.

In the drawings, ci is the workingpiston; b,

\ the. transfer-piston.` The working-piston a is "connected to the arm c by links d, the arm c projectin g from an encircling shaft, f, which is keyed to the rock-shaft c, and at the other end of the encircling shaft j' projects the arm g,

which is connected with the driving-wheel h by the rod t, as shown. The transfer-piston is connected with the rocking arm 7c by the rod (No model.)

b', which passes through the working-piston a, being provided with a stuiiing-box in the top of the working-piston, and the rod l, said rocking arm lc'and rod l moving between the links d, the end ot' the arm cbeing curved,.so as to permit the oscillation of the arm lo. The arm k works freely upon the rock-shaft c by the sleeve m, from which extends the curved rocking arm n, which is connected by the rod `o to a crank,11,on the end of the driving-wheel shaft on the opposite side of the engine, as shown in Fig. 2. To the same crank p is pivoted the rod q, which is attached to the plunger ofthe pump r. y Within the outer casing is `an inner cylinder, a', in which the working piston moves, extending downward `within the bodyof the casingaboutthelengthof the stroke of the workingpiston a. Around the workingpiston cylinder, inside the casing, and extend .ing down below the end'of the inner cylinder,.is

upward movement, forces the air to the lower end ot' the cylinder, where it is heated, eX- pauds, and forces the working-piston upward. While the working-piston is moving upward the transferpiston moves downward and forces the hot air to the upper part of the cylinder, where, coming in contact with the cold pipes, it `is cooled, contracts, and thus allows the Working-piston to descend. The transfeipia ton again moves upward, and the operation is repeated. The movement of the working-piston is communicated through the links d, 'rock ing arm c, encircling shaft j', rock-shaft c, rocking arm g, and the rod t' to the driving-wheel, from the driving-wheel through the drivingwheel shaft to the crank p, rod 0rocking arm n, sleeve m, rocking arm k, rod l to the transfer-piston, the parts being so adjusted and ar; ranged that a stroke of the working-piston is one-half that of the transfer-piston.

ICQ

Y the rod q. If desirable, the Water may be supplied from a tank.

In other air-engines the air is cooled by coming in contact with a Water-jacket in which a solid body of Water is kept around the hot-airV cylinder, this arrangement affording a limited cooling-surface. By the use of a coil a much greatercooling-surt'ace -is secured, as the air circulates all around the pipes, and by thus increasing the difference in temperature the power of the engine is greatlyincreased. Moreover, the Walls of the pipes may be made much thinner than those of the water-jacket, thus producing a more effective cooling surface. The suction side of the pump may be connected to the coil, thus reducing the pressure.

The coils may be made of brass, Wroughtiron, or other material, as may bedesirable.

My invention may be used for pumping water, or for any other purpose to which an engine is applicable. i

Having thus described my invention, what I Vclaim as new, and wish to secure by Letters Patent, is-

1. In an air-engine, the combination, with the cylinder, driving-wheel, and shaft, of a working-piston, a, inner cylinder, e', links d,

encircling shaft f, having arms c and g, said shaft being keyed to a rock-shaft, e, and a connecting-rod, z', all substantially as set forth.

2. The combination,\vith thecylinder, driv ing-Wheel, shaft,.and a crank, p, of an air-engine, of a transfer-piston, b, rod b', connectingrod l, sleeve m, having arms k and n, rockshatt e, and connecting-rod t', all substantially as set forth. h

3. In an air-engine, the combination, Withthe ey-linder, driving-Wheel, shaft, and a crank, p, of. a Working-piston, a, inner cylinder, a', links d, encircling shaft f, having arms c and g, rock-shaft e, connecting-rod t', and a transfer-piston,'b, rod b', conneotingrod l, sleeve m, having arms 7c and mand a connecting-rod, o, all substantially as set forth. v

4. The combination, with the cylinder of a air-engine, of a coil of pipe, s, and means for circulating a cooling medium through the same, all substantially as set forth.

5. In an air-engine, the combination, with the cylinder or. shell and an inner cylinder,a., a working-piston, a, and a transfer-piston, b,

of a coil of pipe, s, and a pump, r, all substan! tially as set forth.

6. The combination, in an airengne, of a pump for pumping water, and a coil of pipe, connected with said pump either by suction or delivery, so as to cause a circulation of water through the said coil of pipe, all substantially as set forth.

In testimony that I claim the foregoing I have vhereunto set my hand this^13th day ofy March, 1883.

HARVEY H. BURRITT.

Witnesses F. F. CAMPBELL, CHARLES H. PELL. 

